Add E2E test for trying to convert a text column of words to a number column

[seancolsen]

Context

See #1122 for more info and instructions on writing E2E tests.

This test

Write an E2E test which asserts that "trying to convert a text column of words to a number column" fails. Here's a visual demo of what the test should do:

Tips

• Assert that the toast message displays. As you can see in the demo, our toast messages are not correctly displaying the full error message (due to Gracefully handle new API error structure in toast messages #1045), but that's okay. You only need to assert that the first part of the text in the toast message matches.

[ManishShah120]

I would like to work on this issue, 👍

[kgodey]

Thanks @ManishShah120, go ahead.